Sealing tool



March 18 1924. 7, 4

T. E. DINGWALL SEALING TOOL Filed June 4. 1923 2 Sheets-Sheet 1 March 18 1924.

1,487,543 T. E. DINGWALL SEALING TOOL Filed June 4, 1923 2 Sheets-Sheet 2 Patented Mar. 18, 1924.

UNITED STATES moms EDMUND DINGWALL, or BUTTON, ENGLAND.

SEALING TOOL.

Application filed Jime To all whom it may concern.

Be it known that I, THOMAS EDMUND DINGWALL, a subject of the King of Great Britain, residing at Hutton, Essex, England, have invented certain new and useful Improvements in Sealing Tools, of which the following is a specification.

The present invention relates to sealing tools such as are used for attaching sealing devices in packing, for example, parcels, bags, sacks, &c., to prevent tampering.

The present invention particularly relates to a tool used in attaching a sealing device consisting of a disc or plate of metal having depending marginal teeth or tangs adapted to be pressed through several folds or layers of material and then folded over or clinched into the packing material, or, otherwise, into a soft penetrable component according to my prior application for Letters Patent No. 617,109. For better gripping the string or like, the sealing device may be arranged to present a serrated edge to the string or like between the tangs.

For the purpose of .accommodating strings, cords, or the like of different thickness, or a multiple thereof, the prongs may be unequally spaced round the head to provide more space between the prongs in one direction than another,- as for example in the case of a four pronged sealing device with a rectangular prong setting more space may thus be provided in one direction between the prongs than in the direction at right angles. to the first direction.

In the driving tool, the mouth of the barrel in which the string or like sealing device is placed head first preparatory to driving it, requires to be notched for the two fold purpose of (a) fitting'over the string.

or like, and (b) giving guidance for cor rectly placing the toothed disc in the barrel so as to prevent the tangs of the disc from injuriously contacting with the string or like in driving.

This is open to the objection of militating against that quick and ready positioning of the sealing device in the tool and of the tool for driving which is essential in packing if prompt despatch is to be realized, inasmuch as the tool, which, in general, for ordinary purposes, comprises a staple like frame with an anvil at the end of one limb and a barrel and driver at the end of the other limb, allows very little space and play for the 1923. Serial No. 643,442. f

fingers and must be shifted bodily to place the notched barrel mouth correctly over the string or like, and frequently the necessary manipulation to effect this is diflicult or impossible and at the best is awkward and time wasting. a

An object. of the present invention is to overcome these disadvantages by better adapting the tool for string or the like seal- To this end the 001 is fitted with a rotat- A able notched barrel or holder forthe recepe tion of the sealing device whereby the notches may be quickly located over the string or like by turning the barrel or holder into the appropriate position while the tool itself remains stationary.

Rotatably mounting thebarrel or holder 7 has the advantage that the barrel or holder may be turned into any position so that the notches shall properly fit acrossthe string of the parcel at whatever angle the tool is inserted, thereby ensuring the seal being clenched centrally over the string enabling the small teethor serrations to grip the string firmly so as to prevent its withdrawal,

5 and also making it possible to secure the tied ends and the cross string through the wrapping material ata maximum distance from the fo1d over of the wrapper, whereby tampering is prevented or reduced to a minimum. 1

The barrel or holder may convenientlyand advantageously be provided with a pair of stepped notches, orwith two or more pairs of notches of different widths and depths for accommodating varying thicknes'sesof string or. like. 1

A simple constructional form of tool under the presentinvention is illustrated ,in

the accompanying drawingain which Fig.1 is a side: elevation. l

Fig. 2 is a vertical section through the 7 driver and barrel. 7

Fig. 3 is a part sectional elevation of a toothed disc sealing device.

Fig. 4 shows a serviceable sealing of the end folds, and also the tied string ends and cross string of a string tied parcel, the latter sealing at a maximum distance from. the fold over of the wrapper.

In the simple constructional form illustrated, a cylindric barrel or holder or is both rotatably and slidingly mounted on the driving end I; of the plunger 0 and is normally projected beyond that end I) by a c lindrie spiral compression spring cZ working between a stop eon the plunger 0 andan inturned flange f on the barrel a, this inturned flange f co-operating with an outturned flange 9 at the driving end I) of the plunger 0 for limiting the outward movement of the barrel or holder a.

The plunger 0 is slidingly mounted in the upper limb h of the staple like frame 3' and is linked to a lever in which is hinged to a bifurcated forward extension [of such'upper limb h and is normally held in a raised or open'position by amouse-trap spring m.

The power of recession of the barrel or holder a with respect to the anvil 0 of the lower limb g of the frame j by sliding backover the plunger 0 facilitates the insertion of the sealing device by giving'more space play for thefingers and admits of a quick ejection of the sealing device if required; 'it also enables the sealing device to be inserted in an efi'ortless mechanical manner-and then turned to position by pressing against the side of the tangs s of the toothed disc 25 left exposed by the barrel or holder when partially receded.

Thestepped notches for accommodating varying thicknesses of string are shown by 7 in Figs. 1 and 2.

In Fig. 4;, u designates the string ends and w the cross string as sealed by the sealing disc t with the aid of a sealing tool as shewn at a maximum distance from the edge :12 of the folded wrapper, thus much increasing the difiiculty of tampering. j

The most secure and correct method of wrapping a parcel for sealing with the sealing discs 25 as shewn in Fig. 4, is as follows i In folding over the front portion 1 of the wrapping material, instead of turning it down behind, stop at the back edge 2,bend it towards you'together with the back flap 3 as Fig. 4 to about three quarters of the width of the parcel. Fold down the top portions 4 then the two sides 5 and bring up the bottom flap 6. This enables the tool to be inserted under all the folds, securely sealing them and preventing the hand being inserted to get at the'contents of the parcel.

The end seal t at the right hand of'Fig. 4;.

can be locked to end folds 4, 5 and 6 by passing the tool anvil under the edge 00.

What I claim is 1. In a sealing tool of the kind described the combination with a co-operating anvil and a driver for driving and clinching a pronged sealing device, of a rotatable notched sleeve on the driver provided with notches for receiving the strings sealed by the seal attached by the sealer.

2. In combination with a sealing tool as set forth in claim 1. in which the notches in the sleeve are stepped to receive varying thicknesses of string.

3.. In a sealing tool of the kind described the combination with a co-operating anvil and a driver for driving and clinching a pronged sealing device, of a rotatable notched sleeve on the driverprovided with i notches for receiving the strings sealed by the seal attached by the sealer, said rota-' table notched sleeve beingmounted for re cession on the leading end of the driver, and

a spring for normally projecting said sleev beyond the leading end of the driver.

4. In combination with a sealing tool as set forth in claim 8 in which the notches in the sleeve are stepped to receive varying thicknesses of string.

5. A sealing tool of the kind described comprising a staple like frame, an anvil on Y the lower limb of said frame, a plunger slidingly mounted in the upper limb of said frame, means for operating'said plunger, and a rotatable notched sleeve mounted on the driving end of said plunger and provided with. notches for receiving the strings sealed by the seal attached by the sealer.

ture.

THOMAS EDMUND DINGWALL.

.9 6. Asealing tool of the kind described 

